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A sonority hierarchy or sonority scale is a hierarchical ranking of speech sounds (or phones). Sonority is loosely defined as the loudness of speech sounds relative to other sounds of the same pitch, length and stress, [ 1 ] therefore sonority is often related to rankings for phones to their amplitude. [ 2 ]
A good example for the SSP in English is the one-syllable word trust: The first consonant in the syllable onset is t, which is a stop, the lowest on the sonority scale; next is r, a liquid which is more sonorous, then we have the vowel u / ĘŚ / – the sonority peak; next, in the syllable coda, is s, a sibilant, and last is another stop, t.
Sonority is a measure of the amplitude of a speech sound. The particular ranking of each speech sound by sonority, called the sonority hierarchy, is language-specific, but, in its broad lines, hardly varies from a language to another, [7] which means all languages form their syllables in approximately the same way with regards to sonority.
The following is the chart of the International Phonetic Alphabet, a standardized system of phonetic symbols devised and maintained by the International Phonetic Association. It is not a complete list of all possible speech sounds in the world's languages, only those about which stand-alone articles exist in this encyclopedia.
If the coda consists of a consonant cluster, the sonority typically decreases from first to last, as in the English word help. This is called the sonority hierarchy (or sonority scale). [24] English onset and coda clusters are therefore different. The onset /str/ in strengths does not appear as a coda in any English word.
[1] The following tables present pulmonic and non-pulmonic consonants. In the IPA, a pulmonic consonant is a consonant made by obstructing the glottis (the space between the vocal cords) or oral cavity (the mouth) and either simultaneously or subsequently letting out air from the lungs. Pulmonic consonants make up the majority of consonants in ...
A scale of vowels is an arrangement of vowels in order of perceived "pitch". A scale used for poetry in American English lists the vowels by the frequency of the second formant (the higher of the two overtones that define a vowel sound).
Lenition can be seen as a movement on the sonority hierarchy from less sonorous to more sonorous, or on a strength hierarchy from stronger to weaker. In examples below, a greater-than sign indicates that one sound changes to another.